<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>生命周期</title>
</head>
<body>
<div id="root">

</div>
</body>
<script src="js/old/babel.min.js"></script>
<script src="js/old/react.development.js"></script>
<script src="js/old/react-dom.development.js"></script>
<script type="text/babel">
  const vdom = <div>React app</div>

  ReactDOM.render(vdom, document.getElementById('root'))
</script>
</html>